CN110685380A - Shear wall construction method for reducing internal bubbles - Google Patents
Shear wall construction method for reducing internal bubbles Download PDFInfo
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- CN110685380A CN110685380A CN201910950237.9A CN201910950237A CN110685380A CN 110685380 A CN110685380 A CN 110685380A CN 201910950237 A CN201910950237 A CN 201910950237A CN 110685380 A CN110685380 A CN 110685380A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/56—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
Abstract
The invention discloses a shear wall construction method for reducing internal bubbles, which comprises the following steps: s1, building a template; s2, reinforcing ribs in the die; s3, pouring concrete; s4, curing and forming; s5, disassembling the template; the concrete comprises the following components in parts by weight: 20-25 parts of Portland cement; 13-15 parts of water; 45-50 parts of crushed stone, wherein the particle size of the crushed stone is 20-25 mm; 10-12 parts of fly ash, wherein the particle size of the fly ash is 5-10 mm; 7-10 parts of mineral powder, wherein the particle size of the mineral powder is 0.05-0.5 mm; 5-8 parts of silicon dioxide powder, wherein the particle size of the silicon dioxide powder is 3-5 mm; 1-2 parts of pineapple leaf fiber, which is beneficial to reducing foam pores in the shear wall so as to improve the compactness of the shear wall and enhance the compressive strength and the flexural strength of the shear wall.
Description
Technical Field
The invention relates to the field of building construction, in particular to a shear wall construction method for reducing internal bubbles.
Background
Shear walls, also known as wind-resistant walls, earthquake-resistant walls or structural walls, are walls of houses or structures which mainly bear horizontal loads and vertical loads (gravity) caused by wind loads or earthquake action, prevent the structures from being sheared and damaged, and are generally made of reinforced concrete.
The existing shear wall is generally formed by pouring concrete in fixed steel bars, but the concrete is easy to generate bubbles in the pouring process, so that a large number of holes are easy to generate in the interior of the shear wall formed by pouring, the compactness of the shear wall is easy to influence, the compression strength and the flexural strength of the shear wall are easy to influence, and even the safety of a house or a structure is easy to influence, so that the improvement space is still provided.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a shear wall construction method for reducing internal bubbles, and the method has the advantage of being beneficial to improving the compactness of the shear wall.
In order to achieve the purpose, the invention provides the following technical scheme:
a shear wall construction method for reducing internal bubbles comprises the following steps:
s1, building a template: building a pouring template according to a design drawing;
s2, reinforcing ribs in a mould: manufacturing a steel bar according to the size of the steel bar of a design drawing and fixing and binding the steel bar;
s3, pouring concrete: concrete is poured into the pouring template in sections, the pouring height of each section is 30-35cm, when the pouring of one section of concrete is finished, the concrete is vibrated uniformly firstly, then the next section of concrete is poured, and the pouring of the next section of concrete is carried out before the initial setting of the previous section of concrete;
s4, curing and forming;
s5, disassembling the template;
the concrete comprises the following components in parts by weight:
20-25 parts of Portland cement;
13-15 parts of water;
45-50 parts of crushed stone, wherein the particle size of the crushed stone is 20-25 mm;
10-12 parts of fly ash, wherein the particle size of the fly ash is 5-10 mm;
7-10 parts of mineral powder, wherein the particle size of the mineral powder is 0.05-0.5 mm;
5-8 parts of silicon dioxide powder, wherein the particle size of the silicon dioxide powder is 3-5 mm;
1-2 parts of pineapple leaf fiber.
Adopt above-mentioned technical scheme, pour through segmenting the concrete, and every section is pour and is accomplished the back and all is vibrated earlier and is evenly carried out next section and pour, be favorable to gathering materials in the concrete and piling up more densely, simultaneously, be favorable to gathering materials and distribute more evenly in the concrete, still be favorable to the bubble to spill over the concrete at the vibration in-process, thereby make to be difficult to have the bubble in the concrete, make the shear force wall that adopts concrete pouring to become inside be difficult to have the hole more, be favorable to improving the closely knit degree of shear force wall, make the compressive strength and the rupture strength of shear force wall be difficult to receive the influence more, and then be favorable to improving the security performance of house or structure.
By controlling the amount of aggregate in the concrete and the particle size range, the aggregate in the concrete is more densely accumulated, so that pores are less likely to exist in the concrete, the compactness of the shear wall formed by pouring the concrete is improved, the compressive strength and the flexural strength of the shear wall are less likely to be influenced, and the safety performance of a house or a structure is improved.
The invention is further configured to: in step S1, the template is made of bamboo plywood.
By adopting the technical scheme, the bamboo plywood is used as a material for building the template, the surface of the bamboo plywood is smooth and flat, and meanwhile, the surface of the bamboo plywood is easier to keep clean, so that the smoothness of the surface of the shear wall formed by pouring the template is improved, and the appearance effect of the shear wall is less prone to being influenced.
The invention is further configured to: in step S3, before the concrete is poured, a layer of cement mortar is uniformly applied to the periphery of the pouring template.
By adopting the technical scheme, the periphery of the pouring template is uniformly coated with the cement mortar layer before the concrete is poured, so that the sealing property of the pouring template is improved, the concrete is difficult to leak in the pouring process, the shear wall is favorably formed better, and the appearance effect of the formed shear wall is difficult to influence.
The invention is further configured to: in step S3, before the concrete is poured, a layer of release agent is uniformly coated in the pouring template.
By adopting the technical scheme, the release agent is coated in the pouring template before the concrete is poured, so that the shear wall is more easily separated from the template in the process of detaching the template, and the condition that the outer wall of the shear wall is easily adhered to the template to influence the appearance effect of the shear wall is favorably reduced.
The invention is further configured to: in the step S3, the vibrator is used to vibrate the concrete, the vibrating radius of the vibrator is controlled to be 45-75cm, and the insertion distance of the vibrator is controlled to be 50-55 cm.
Adopt above-mentioned technical scheme, through the radius of vibrating and the vibrator male interval of control vibrator, be favorable to pouring the concrete in the template and be vibrated evenly better, thereby be favorable to gathering materials evenly dispersed in the concrete better, and simultaneously, make the concrete be difficult to appear the condition of excessive vibration, and then be favorable to the bubble in the concrete to spill over the concrete more completely, make be difficult to leave the bubble in the concrete more, and then be favorable to improving the closely knit degree of the shear force wall that adopts concrete placement to form, make the compressive strength and the flexural strength reinforcing of shear force wall, make the security performance of house or structure improve.
The invention is further configured to: controlling the vibration time of each time the vibrator is inserted into the concrete to be 32-40 s.
Adopt above-mentioned technical scheme, insert the time of vibrating in the concrete at every turn through control vibrator, the concrete that is favorable to pouring in the template is vibrated more fully, simultaneously, make the concrete be difficult to appear the condition of excessive vibration, thereby be favorable to the bubble in the concrete to spill over the concrete more completely, make be difficult to leave the foam in the concrete more, and then be favorable to improving the density of the shear force wall that adopts concrete placement to form, make the compressive strength and the flexural strength reinforcing of shear force wall, make the security performance of house or structure improve.
The invention is further configured to: the concrete also comprises the following components in parts by mass:
1-2 parts of a silane coupling agent;
0.5-1 part of benzothioxanthene dicarboxylic anhydride;
3-5 parts of micro silicon powder;
0.8-1.3 parts of corner powder.
By adopting the technical scheme, the benzothioxanthene dicarboxylic anhydride, the micro silicon powder and the corner powder are compounded, so that the pores in the concrete can be better filled, bubbles are not easy to exist in the concrete, the compactness of the shear wall formed by pouring the concrete can be improved, the compressive strength and the flexural strength of the shear wall are enhanced, and the safety of a house or a building is improved.
The invention is further configured to: the concrete also comprises the following components in parts by mass:
1-1.5 parts of kudzu root powder.
By adopting the technical scheme, the kudzu vine root powder is added, so that the pores in the concrete can be better filled, bubbles are not easy to exist in the concrete, the compactness of the shear wall formed by pouring the concrete can be improved, the compressive strength and the flexural strength of the shear wall are enhanced, and the safety of a house or a structure is improved.
The invention is further configured to: the concrete also comprises the following components in parts by mass:
0.6-1 part of turmeric powder.
By adopting the technical scheme, through adding the turmeric powder and the kudzu root powder to cooperate with each other, the kudzu root powder is favorably and uniformly dispersed in the concrete better so as to better fill the pores in the concrete, bubbles are not easy to exist in the concrete, the compactness of the shear wall formed by pouring the concrete is favorably improved, the compressive strength and the flexural strength of the shear wall are enhanced, and the safety of a house or a structure is improved.
The invention is further configured to: the concrete also comprises the following components in parts by mass:
0.3-0.5 part of desert fruit shell powder, wherein the particle size of the desert fruit shell powder is 1-1.5 mm.
By adopting the technical scheme, the desert shell powder is added and the particle size of the desert shell powder is controlled, so that the compressive strength and the flexural strength of the concrete are favorably improved, the compressive strength and the flexural strength of the shear wall are stronger, meanwhile, the desert shell powder is favorably filled in pores in the concrete, the compactness of the concrete is improved, the compressive strength and the flexural strength of the shear wall formed by pouring the concrete are not easily influenced, and the safety performance of a house or a structure is higher.
In conclusion, the invention has the following beneficial effects:
1. the concrete is poured in sections, so that aggregate in the concrete is favorably accumulated more densely, bubbles are favorably overflowed out of the concrete in the vibrating process, the compactness of the shear wall is favorably improved, the compression strength and the bending strength of the shear wall are more difficultly influenced, and the safety performance of a house or a building is favorably improved;
2. by controlling the using amount and the particle size range of the aggregates in the concrete, the aggregates in the concrete can be more densely accumulated, the compactness of the shear wall formed by pouring the concrete can be improved, the compressive strength and the flexural strength of the shear wall can be more difficult to influence, and the safety performance of a house or a building can be improved;
3. by controlling the vibrating radius of the vibrator, the inserting distance of the vibrator and the vibrating time, the concrete in the pouring template can be more fully vibrated, meanwhile, the excessive vibrating condition of the concrete is not easy to occur, the compactness of the shear wall formed by pouring the concrete is favorably improved, the compressive strength and the flexural strength of the shear wall are enhanced, and the safety performance of a house or a structure is improved;
4. by adopting the compounding of the benzothioxanthene dicarboxylic anhydride, the micro silicon powder and the corner powder, the method is favorable for better filling pores in concrete, improving the compactness of the shear wall formed by pouring concrete, enhancing the compressive strength and the flexural strength of the shear wall and improving the safety of a house or a building.
Drawings
FIG. 1 is a process flow diagram of a shear wall construction method for reducing internal bubbles according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
In the following examples, Portland cement is Portland cement P.O42.5, a Wawa stone produced by cement works in Wuhanyang dynasty.
In the following examples, crushed stone having a particle size of 20 to 25mm was used from Shenyang Gonggang wollastonite mining Co.
In the following examples, fly ash with a particle size of 5-10mm from the mineral processing plant of Lingshou Dada.
In the following examples, the ore powder used in the Baifeng mineral processing factory, Lingshu county, was 0.05-0.5mm in particle size.
In the following examples, silica powder having a particle size of 3 to 5mm from Guangzhou Shiwami Biotech Co.
In the following examples, pineapple leaf fibers of the Yingkang Li textile warrior department are used as the pineapple leaf fibers.
In the following examples, the silane coupling agent used was KH-510, a model number of Nanjing warp weft chemical Co.
In the following examples, the benzothioxanthene dicarboxylic anhydride used was benzothioxanthene dicarboxylic anhydride sold under the trade name alihn20-30499 by Kilo Korea.
In the following examples, the fine silica powder used was a fine silica powder having a particle size of 1000 mesh manufactured by luoyang metallocene silicon industries ltd.
In the following examples, corner powder obtained from cooperative society of agricultural product planting, Jufeng, Weishan county, was used.
In the following examples, the kudzu root powder is the kudzu root powder of Foshan Xinhang Biotechnology Ltd.
In the following examples, turmeric powder was prepared from turmeric powder obtained from qi Xuan food Co., Ltd, Dongguan, wherein the commercial barcode is TWPJHF 01.
In the following examples, desert fruit shell powder is prepared from the raw material of Linshou Lin mineral processing plant, which has a cargo size of 011 particle size 1-1.5 mm.
Example 1
A shear wall construction method for reducing internal bubbles comprises the following steps:
s1, building a template, specifically comprising the following steps:
and determining the position of the shear wall according to the design drawing, marking, and then building a pouring template according to the marked position. In this embodiment, the material of the form is a clean-surfaced wood board.
S2, reinforcing ribs in the die, which are specifically as follows:
and manufacturing a steel bar according to the size of the steel bar required by the design drawing, and binding the steel bar to be fixed on the pouring template.
S3, pouring concrete, specifically including:
concrete is poured into the pouring template in sections, the pouring height of each section is 30cm, when pouring of one section of concrete is completed, the concrete is vibrated uniformly by adopting a vibrator, the vibrating radius of the vibrator is controlled to be 40cm, the insertion distance of the vibrator is controlled to be 45cm, the vibrating time is controlled to be 30s, when the surface of the concrete presents laitance and does not sink any more, the vibration is stopped, and the next section of concrete is poured before the poured concrete is initially set.
S4, curing and forming, specifically comprising the following steps:
after the concrete is vibrated, the concrete is covered by the geotextile in time, and water is sprayed on the geotextile, so that the geotextile is kept wet all the time, and the shear wall is formed after 10 days of maintenance.
S5, disassembling the template, specifically as follows:
and after the shear wall is cured and formed, disassembling the pouring template to obtain the shear wall with the internal bubbles reduced.
Wherein, the concrete comprises the following components:
20kg of Portland cement; 14kg of water; 47.5kg of broken stones; 10kg of fly ash; 10kg of mineral powder; 8kg of silicon dioxide powder; pineapple leaf fiber 2 kg.
The preparation method of the concrete comprises the following steps:
adding 7kg of water into a 150L stirring kettle, stirring at the normal temperature at the rotating speed of 250r/min, adding 47.5kg of broken stone, 10kg of fly ash, 10kg of mineral powder and 8kg of silicon dioxide powder while stirring, raising the temperature to 60 ℃ after uniformly stirring, adding 20kg of Portland cement, 7kg of water and 2kg of pineapple leaf fiber while stirring, and stirring until the temperature is reduced to the room temperature under the natural condition after uniformly stirring to obtain the concrete.
Example 2
The difference from example 1 is that: in step S3, the vibrating radius of the vibrator is controlled to be 45cm, the inserting distance of the vibrator is controlled to be 50cm, and the vibrating time is controlled to be 32S.
Example 3
The difference from example 1 is that: in step S3, the casting height of each section of concrete is controlled to be 33cm, the vibrating radius of the vibrator is controlled to be 60cm, the inserting distance of the vibrator is controlled to be 53cm, and the vibrating time is controlled to be 36S.
Example 4
The difference from example 1 is that: in step S3, the casting height of each section of concrete is controlled to be 35cm, the vibrating radius of the vibrator is controlled to be 75cm, the inserting distance of the vibrator is controlled to be 55cm, and the vibrating time is controlled to be 40S.
Example 5
The difference from example 1 is that: in step S3, the casting height of each section of concrete is controlled to be 34cm, the vibrating radius of the vibrator is controlled to be 55cm, the inserting distance of the vibrator is controlled to be 51cm, and the vibrating time is controlled to be 35S.
Example 6
The difference from example 5 is that:
the raw material of the casting template in the step S1 is a bamboo plywood.
In step S3, before pouring concrete, a layer of mold release agent is uniformly coated on the inner wall of the pouring template, a layer of cement mortar is uniformly coated on the periphery of the pouring template to ensure the sealing property of the pouring template, and then concrete is poured into the pouring template.
Example 7
The difference from example 6 is that:
the concrete comprises the following components:
22.5kg of Portland cement; 13kg of water; 50kg of crushed stone; 11kg of fly ash; 7kg of mineral powder; 6.5kg of silicon dioxide powder; 1kg of pineapple leaf fiber.
The preparation method of the concrete comprises the following steps:
adding 6.5kg of water into a 150L stirring kettle, stirring at the normal temperature at the rotating speed of 250r/min, adding 50kg of crushed stone, 11kg of fly ash, 7kg of mineral powder and 6.5kg of silicon dioxide powder while stirring, raising the temperature to 60 ℃ after uniformly stirring, adding 22.5kg of Portland cement, 6.5kg of water and 1kg of pineapple leaf fiber while stirring, and stirring under a natural condition until the temperature is reduced to the room temperature to obtain the concrete.
Example 8
The difference from example 6 is that:
the concrete comprises the following components:
25kg of Portland cement; 15kg of water; 45kg of crushed stone; 12kg of fly ash; 8.5kg of mineral powder; 5kg of silicon dioxide powder; 1.5kg of pineapple leaf fiber.
The preparation method of the concrete comprises the following steps:
adding 7.5kg of water into a 150L stirring kettle, stirring at the normal temperature at the rotating speed of 250r/min, adding 45kg of crushed stone, 12kg of fly ash, 8.5kg of mineral powder and 5kg of silicon dioxide powder while stirring, raising the temperature to 60 ℃ after uniformly stirring, adding 25kg of Portland cement, 7.5kg of water and 1.5kg of pineapple leaf fiber while stirring, and stirring under a natural condition until the temperature is reduced to the room temperature to obtain the concrete.
Example 9
The difference from example 6 is that:
the concrete comprises the following components:
23kg of Portland cement; 13.5kg of water; 46kg of broken stones; 12.5kg of fly ash; 9kg of mineral powder; 6kg of silicon dioxide powder; 1.7kg of pineapple leaf fiber.
The preparation method of the concrete comprises the following steps:
adding 6.75kg of water into a 150L stirring kettle, stirring at the normal temperature at the rotating speed of 250r/min, adding 46kg of broken stone, 12.5kg of fly ash, 9kg of mineral powder and 6kg of silicon dioxide powder while stirring, raising the temperature to 60 ℃ after uniformly stirring, adding 23kg of Portland cement, 6.75kg of water and 1.7kg of pineapple leaf fiber while stirring, and stirring under a natural condition until the temperature is reduced to the room temperature to obtain the concrete.
Example 10
The difference from example 9 is that:
the concrete also comprises the following components:
2kg of silane coupling agent; 1kg of benzothioxanthene dicarboxylic anhydride; 3kg of micro silicon powder; 1.3kg of corner powder.
Wherein, the silane coupling agent, the benzothioxanthene dicarboxylic anhydride, the silica fume and the corner powder are added into the stirring kettle together with the portland cement, the rest water and the pineapple leaf fiber.
Example 11
The difference from example 9 is that:
the concrete also comprises the following components:
1kg of silane coupling agent; 0.5kg of benzothioxanthene dicarboxylic anhydride; 5kg of micro silicon powder; 0.8kg of corner powder.
Wherein, the silane coupling agent, the benzothioxanthene dicarboxylic anhydride, the silica fume and the corner powder are added into the stirring kettle together with the portland cement, the rest water and the pineapple leaf fiber.
Example 12
The difference from example 11 is that: the concrete lacks the component benzothioxanthene dicarboxylic anhydride.
Example 13
The difference from example 11 is that: the concrete lacks the component micro silicon powder.
Example 14
The difference from example 11 is that: the concrete lacks the component corner powder.
Example 15
The difference from example 9 is that:
the concrete also comprises the following components:
1kg of silane coupling agent; 1kg of benzothioxanthene dicarboxylic anhydride; 4kg of micro silicon powder; 0.8kg of corner powder; 1.5kg of kudzu root powder; turmeric powder 0.8 kg; 0.3kg of desert fruit shell powder.
Wherein, the silane coupling agent, the benzothioxanthene dicarboxylic anhydride, the micro silicon powder, the corner powder, the kudzu root powder, the turmeric powder and the desert shell powder are added into a stirring kettle together with the silicate cement, the rest water and the pineapple leaf fiber.
Example 16
The difference from example 9 is that:
the concrete also comprises the following components:
1.5kg of silane coupling agent; 0.5kg of benzothioxanthene dicarboxylic anhydride; 5kg of micro silicon powder; 1.05kg of corner powder; 1kg of kudzu root powder; 1kg of turmeric powder; 0.4kg of desert fruit shell powder.
Wherein, the silane coupling agent, the benzothioxanthene dicarboxylic anhydride, the micro silicon powder, the corner powder, the kudzu root powder, the turmeric powder and the desert shell powder are added into a stirring kettle together with the silicate cement, the rest water and the pineapple leaf fiber.
Example 17
The difference from example 9 is that:
the concrete also comprises the following components:
2kg of silane coupling agent; 0.75kg of benzothioxanthene dicarboxylic anhydride; 3kg of micro silicon powder; 1.3kg of corner powder; 1.25kg of kudzu root powder; turmeric powder 0.6 kg; 0.5kg of desert fruit shell powder.
Wherein, the silane coupling agent, the benzothioxanthene dicarboxylic anhydride, the micro silicon powder, the corner powder, the kudzu root powder, the turmeric powder and the desert shell powder are added into a stirring kettle together with the silicate cement, the rest water and the pineapple leaf fiber.
Example 18
The difference from example 9 is that:
the concrete also comprises the following components:
1.6kg of silane coupling agent; 0.6kg of benzothioxanthene dicarboxylic anhydride; 3.5kg of micro silicon powder; 1.1kg of corner powder; 1.4kg of kudzu root powder; turmeric powder 0.9 kg; 0.35kg of desert fruit shell powder.
Wherein, the silane coupling agent, the benzothioxanthene dicarboxylic anhydride, the micro silicon powder, the corner powder, the kudzu root powder, the turmeric powder and the desert shell powder are added into a stirring kettle together with the silicate cement, the rest water and the pineapple leaf fiber.
Comparative example 1
The difference from example 9 is that: the particle size of the crushed stone is 10-20 mm.
Comparative example 2
The difference from example 9 is that: the particle size of the crushed stone is 25-30 mm.
Comparative example 3
The difference from example 9 is that: the grain diameter of the fly ash is 1-5 mm.
Comparative example 4
The difference from example 9 is that: the grain diameter of the fly ash is 10-15 mm.
Comparative example 5
The difference from example 9 is that: the particle size of the mineral powder is 0.01-0.05 mm.
Comparative example 6
The difference from example 9 is that: the particle size of the mineral powder is 0.5-1 mm.
Comparative example 7
The difference from example 9 is that: the particle size of the silicon dioxide is 1-3 mm.
Comparative example 8
The difference from example 9 is that: the particle size of the silicon dioxide is 5-10 mm.
Experiment 1
The shear walls prepared in the above examples and comparative examples were cut in a certain direction, the number of holes (number) of the cut surface was counted, and the area (m) of the cross section was calculated2) And calculating to obtain the hole density (per m) inside the shear wall2)。
Experiment 2
The 28d compressive strength (MPa) of the shear wall prepared in the above examples and comparative examples was tested according to the compressive strength test in GB/T50081-2002 Standard test methods for mechanical Properties of ordinary concrete.
Experiment 3
The flexural strength (MPa) of the shear wall prepared in the above examples and comparative examples was tested according to the flexural strength test in GB/T50081-2002 Standard test methods for mechanical Properties of ordinary concrete.
The data from the above experiments are shown in Table 1.
TABLE 1
According to the data comparison of the embodiments 1 to 5 in table 1, it can be obtained that by controlling the vibrating radius of the vibrator, the inserting distance of the vibrator and the vibrating time in the vibrating process, the aggregate in the concrete is more closely stacked, and meanwhile, the aggregate in the concrete is more uniformly dispersed in the concrete, so that the compactness of the concrete is improved, holes are less prone to exist in the shear wall formed by pouring the concrete, the compressive strength and the flexural strength of the shear wall are further improved, and the safety performance of a house or a structure is improved.
According to the data comparison of the embodiments 6 to 9 in the table 1, by controlling the amount of each component in the concrete, the aggregate in the concrete is more tightly stacked, so that the concrete is less likely to have pores, the concrete is less likely to generate bubbles in the pouring process, the compactness of the shear wall is further improved, the compressive strength and the flexural strength of the shear wall are enhanced, and the safety performance of a house or a structure is improved.
According to the data comparison of the examples 9 to 11 in the table 1, the benzothioxanthene dicarboxylic anhydride, the micro silicon powder and the corner powder are added to be matched with each other in a synergistic manner, so that the pores in the concrete can be better filled, the foam holes are less prone to exist in the concrete, the compactness of the shear wall can be improved, the compressive strength and the flexural strength of the shear wall are enhanced, and the safety of a house or a structure is higher.
According to the comparison of the data in the examples 11 to 14 in table 1, only when the benzothioxanthene dicarboxylic anhydride, the micro silicon powder and the corner powder are cooperatively matched with each other, the effect of improving the compactness of the concrete and the compactness of the shear wall can be better achieved, and any component is lacked, so that the compactness of the shear wall is easily influenced, and the compressive strength and the flexural strength of the shear wall are easily influenced.
According to comparison of data of the embodiment 9 and the embodiments 15 to 17 in table 1, the silane coupling agent, benzothioxanthene dicarboxylic anhydride, silica fume, corner powder, radix puerariae powder, turmeric powder and desert shell powder are added, so that pores in concrete can be better filled, and cells are less likely to exist in the concrete, and therefore, the concrete is less likely to generate bubbles in the pouring process, the compactness of the shear wall is improved, the compressive strength and the flexural strength of the shear wall are enhanced, and the safety performance of a house or a building is higher.
According to the comparison of the data of the embodiments 15 to 18 in table 1, the addition amounts of the silane coupling agent, the benzothioxanthene dicarboxylic anhydride, the micro silicon powder, the corner powder, the radix puerariae powder, the turmeric powder and the desert shell powder are controlled, so that the pores in the concrete can be better filled, the concrete is less likely to have cells, the compactness of the cast shear wall can be improved, the compressive strength and the flexural strength of the shear wall can be enhanced, and the safety performance of a house or a structure can be higher.
According to the comparison of the data of the example 9 and the comparative examples 1 to 8 in the table 1, the aggregate in the concrete is more tightly packed by controlling the particle size of the aggregate in the concrete, so that the concrete is less prone to having pores, the compactness of the shear wall is improved, the compressive strength and the flexural strength of the shear wall are higher, and the safety performance of a house or a building is higher.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (10)
1. A shear wall construction method for reducing internal bubbles is characterized in that: the method comprises the following steps:
s1, building a template: building a pouring template according to a design drawing;
s2, reinforcing ribs in a mould: manufacturing a steel bar according to the size of the steel bar of a design drawing and fixing and binding the steel bar;
s3, pouring concrete: concrete is poured into the pouring template in sections, the pouring height of each section is 30-35cm, when the pouring of one section of concrete is finished, the concrete is vibrated uniformly firstly, then the next section of concrete is poured, and the pouring of the next section of concrete is carried out before the initial setting of the previous section of concrete;
s4, curing and forming;
s5, disassembling the template;
the concrete comprises the following components in parts by weight:
20-25 parts of Portland cement;
13-15 parts of water;
45-50 parts of crushed stone, wherein the particle size of the crushed stone is 20-25 mm;
10-12 parts of fly ash, wherein the particle size of the fly ash is 5-10 mm;
7-10 parts of mineral powder, wherein the particle size of the mineral powder is 0.05-0.5 mm;
5-8 parts of silicon dioxide powder, wherein the particle size of the silicon dioxide powder is 3-5 mm;
1-2 parts of pineapple leaf fiber.
2. The method of claim 1, wherein the shear wall comprises: in step S1, the template is made of bamboo plywood.
3. The method of claim 1, wherein the shear wall comprises: in step S3, before the concrete is poured, a layer of cement mortar is uniformly applied to the periphery of the pouring template.
4. The method of claim 1, wherein the shear wall comprises: in step S3, before the concrete is poured, a layer of release agent is uniformly coated in the pouring template.
5. The method of claim 1, wherein the shear wall comprises: in the step S3, the vibrator is used to vibrate the concrete, the vibrating radius of the vibrator is controlled to be 45-75cm, and the insertion distance of the vibrator is controlled to be 50-55 cm.
6. The method of constructing a shear wall with reduced internal air bubbles of claim 5, wherein: controlling the vibration time of each time the vibrator is inserted into the concrete to be 32-40 s.
7. A shear wall construction method for reducing internal air bubbles according to any one of claims 1 to 6, wherein: the concrete also comprises the following components in parts by mass:
1-2 parts of a silane coupling agent;
0.5-1 part of benzothioxanthene dicarboxylic anhydride;
3-5 parts of micro silicon powder;
0.8-1.3 parts of corner powder.
8. A shear wall construction method for reducing internal air bubbles according to any one of claims 1 to 6, wherein: the concrete also comprises the following components in parts by mass:
1-1.5 parts of kudzu root powder.
9. The method of constructing a shear wall with reduced internal air bubbles of claim 8, wherein: the concrete also comprises the following components in parts by mass:
0.6-1 part of turmeric powder.
10. A shear wall construction method for reducing internal air bubbles according to any one of claims 1 to 6, wherein: the concrete also comprises the following components in parts by mass:
0.3-0.5 part of desert fruit shell powder, wherein the particle size of the desert fruit shell powder is 1-1.5 mm.
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| CN111173128A (en) * | 2020-02-25 | 2020-05-19 | 江苏丰阳建设工程有限公司 | Concrete structure applied to segmental casting method |
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